Fiat Coupe 20vt - Unexpected Missing Tooth at 3000 RPM?

Guys this Car is driving me Crazy…

It starts and runs perfectly fine, though it seems to hit “Unexpected Missing Tooth” at 3000rpm constantly.

I tried these tricks (that helped me in the past):
-Pulldowns (and Pullups) on primary and secondary trigger
-Disable Camsync at 2500 Rpm (so its defo not the hall cam sensor)
-Setting other 1st Tooths & Experimented with output offsets

Shielded stock wire, (stock harness in that matter) so there shouldnt be any wiring issue

Maybe someone has run into this issue before? My next step would be to wire in a Resistor as per Documentation

Scope is fine, i am just gonna attach a screenshot of the Log (since its 3hrs long) and of the trigger settings i ended up with in the end (they varied alot)


PS: Can some admin please delete the other topic? I wanted to edit it but somehow deleted and locked it… Sorry for that

does it happen on cold engine ?

I’ve had a similar problem with a Fiat engine .
The issue was that it seemed to reach a rev limiter around 4500 rpm
Finaly, with my Fluke scopemeter I have seen trouble around the missing teeth …
Replaced sensor with a Hall sensor frow VW, and problem solved !
If you want more details, just ask :wink:

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You can clearly see the double peak following the missing tooth …

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Nope all the time, undependant of the temperature

Weeeelll i think this is it assuming all the filters dont seem to work and the car runs fine untill there…

Honestly it happens at 3500 for me and it also sounds like a limiter too…

Do you remember which vw it was off? Looks like 1.9 TDI would fit

I have used a replacement sensor for VW Part N° : 037.906.433c
You can use Hella 6PU 009.163-761 or Valeo 254038 ( I think it’s from same origin : China :frowning: … )
Be careful for sensor orientation… very important
capt Hall vile chico.pdf (424.0 KB)
!!!
See Motec info :wink:

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Hello
I have a Fiat Bravo 20VT on Ecumaster Classic from 2018, it works without any problems, but now it uses coils from an Audi R8. It also worked with Fiat coils without any problems…all other sensors are original from Fiat 20VT

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So i tried with a 10k ohm resistor today, which moved the issue to 5000 rpms, no idea how it can work with the stock sensors…

Ordered the VW one for now (thanks alloot)

But somehow i want to get it to run with its own sensors